Olcademy Internship Interview Experience

I had a telephonic interview with Olacademy recently. I had applied an internship there
The first round was the HR round where they asked you about what you know about this job, how many hours you will have to dedicate and if we have any questions.
The second round is the Technical Round, which asked me the following questions.

Q.1) Responsiveness of a website, what are the factors that decide it?
Q.2) How do you extract data from a form through PHP?
Q.3) How do you find a student who is 3rd topper in a table from a SQL query?